Downloading an app on your smartphone or tablet is easy over-the-air. No need to connect your mobile device to a computer just to get the apps you want to use. For Android users, go to the Google Play Store, search for apps under different categories, then click on install. While downloading and then deleting an app you don’t like or won’t use is easy, it can take so much of your data and battery---even time! If only we could test an app before actually downloading, life would be so much better.